Yarn package-by observing changes in reflectivity sn



o Z DEFENSIVE PUBLICATION 1 UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 0.G. 1221. Identiflcation is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets of drawing contained in the application as originally filed. The file of this application is available to the public for inspection; reproduction may be purchased for 30 cents per sheet.

Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Ofiice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED APRIL 15, 1969 APPARATUS FOR DETECTING DISCOLORATION IN A CYLINDlRiCAL YARN PACKAGE BY 0B- SERVING CHANGES IN REFLECTIVITY ON THE ENDS OF THE PACKAGE Gerald Irving Buckson, Newark, and John Albert Masino and Stanley Victor Williams, Wilmington, Del., assignors to E. I. du Pont de Nemours and Company, Wilmington, Del., a corporation of Delaware Filed Feb. 16, 1968. Published Apr. 15, 1969 Class 356-196 2 Sheets Drawing. 9 Pages Specification An apparatus for detecting discoloration on the end surface of a rotating cylindrical yarn package 48 wherein a ribbon of light 41 is projected onto the end surface 46. The illuminated portion of the end surface is viewed by a plurality of photoresponsive means 56 through an aperture 64. The electrical output signals from the photoresponsive means are electronically processed and compared to determine if the signals fall within selected limits to indicate elf-standard discoloration of the package end surface. A duplicate apparatus arrangement is provided for simultaneously inspecting both end surfaces of the package.

CKSON ETAL DEF. PUB. 363 ISCOLORATION IN A CYLIND AL OBSERVING CBS IN REFLECTIVI PACKAGE Sheet 1 of 2 Apnl 15, 1969 G. l. BU

APPARATUS FOR DETECTING D YARN memes cum' 0 HE ENDS OF THE Filed Feb. 16, 1968 FIG-l INVENTORS GERALD IRVING BUCKSDN JOHN ALBERT "ASINO STANLEY VICTOR WILLIAMS BY Noam w! MM ATTORNEY DEF. PUB. 102 N A CYLINDRIGAL Tg Sheet 2 oi2 G. I. BUCKSON ETAL 3;: :EEEw

April 15, 1969 APPARATUS FOR DETECTING DISCOL-ORATION I YARN PACKAGE-BY OBSERVING CHANGES IN REFLECTIVITY SN 705017 ON THE ENDS OF THE PACKAGE Filed Feb. 16, 1968 

